@inproceedings{mcguffin2004b,
  author = {Michael J. McGuffin and schraefel, m. c.},
  title = {A Comparison of Hyperstructures:
           Zzstructures, {mSpaces}, and Polyarchies},
  booktitle = {Proceedings of 15th ACM Conference on Hypertext and Hypermedia},
  year = 2004,
  month = "August",
  pages = {153--162},
  location = "Santa Cruz, California"
}